Tube-forming machine



Nov. 10, 1925. 1,561,143

1 H. A. FABER TUBE FORMING MACHINE Filed Feb. 7, 1921 s Sheets-Sheet 1wmas: -flrer $1 Ncv. 19,1925. 1,561,143

v H.A.FABIER.

, TUBE FORMING CHINE Filed Feb. 7, 1921 3 sheets sheet 2 J72 flezzzbr'b, flre rtJfZMer Patented Nov. 10, 1925.

UNITED STATES PATENT oFFics.

HERBERT A. FABEB, 0F CINCINNATI, OHIO, ASSIGNOB TO THE FORMICAINSULATION COMPANY, OF CINCINNATI, OHIO. A CORPORATION 0B OHIO.

TUBE-FORMING MACHINE.

Application filed February 7, 1821.

To all whom it may concern:

Be it known that I, HERBERT A. Fauna, a citizen of the United States,residing at 4614 Spring Grove Avenue, Cincinnati, in the county ofHamilton and State of Ohio, have invented a new and usefulImprovement'in Tube-Forming Machines, of which the following is aspecification.

This invention relates particularly to a machine for forming tubing, afabric, such as paper, which has a varnish or adhesive applied to thesurface thereof.

The primary object is to provide an 1mproved machine of simpleconstruction, which can be easily operated, and which is capable ofproducing a highly desirable product of great uniformity.

The invention is illustrated in its preferred embodiment in theaccompanying drawings, such embodiment being particularly adapted toform tubing for insulation purposes, or for other purposes, from thefabric, such as paper, coated or impregnated ,with a phenoliccondensation product varnish; The paper is dried after the varnish isapplied, and in this condition the paper is passed through the machineillustrated and is wound upon a mandrel, the condensation product beingfused by means of heat applied through one of the pressure-rolls. Inthis "manner, the pliesof paper formed by winding the paper on themandrel are thoroughly bonded together. While the binder employed is aphenolic condensation product, it is ca able of being converted into ahard infusible and insoluble product by means of heat. Some of the heatis applied in the tube forming operation, but this is not sufficient tothoroughly convert the binder to the final infusible and insolublestate. Such conversion may be effected by baking the tubes in an oven ata temperature in the neighborhood of 100 0., or higher; or the tubes,after being formed on a mandrel, may be subjected to pressure betweendies and a heated press, if desired, and the conversion of the binder tothe insoluble state may be effected in the dies.

In the drawings- Fig. 1 represents a perspective view of the improvedmachine, the lower portion of the frame being broken away; Fig. 2, anenlarged broken plan view showing the mandrel and the pressure-rolls andportions of the slides or carriages which carry the Serial No. 443,137.

pressure-rolls; Fig. 3, a broken lon itudinal vertical section, taken asindicate at line 3 of Fig. 2; and Fig. 4, a broken'transverse verticalsection, taken as indicated at line 4 of Fig. 3. f

In the construction illustrated, referring to Fig. 1, A represents theframe of the machine, said frame beingprovided with a top, or bed, A; B,a mandrel which is remova 1y supported in standardsorbearings B, B whichare mounted "oi i -it top of the frame; C, a carria e or slide mountedin guides on the top 0 the frame and carrying a heated pressure-roll Cdisposed at one side of the mandrel; D, a carriage or slide mounted inguides on the top of the frame and earr ing pressure-rolls D and Dlocated on t e other side of the mandrel, that is opposed to theheatedroll C, the axis of the roll D'- being above the axis of themandrel, and the axis of the roll D being below the axis of the mandrel,while the axis of the roll C is in the same plane as the axis of themandrel; C mechanism for shifting the carriage C and applying pressurethrough the roll C to the tube being wound on the mandrel; D mechanismfor shifting the carriage D and applying pressure through the medium ofthe rolls D and D C and D, eccentric devices for shifting the positionof the rockshafts of the mechanisms C and D in order that the ressurerolls may occupy the necessary position in the tube forming o ration,regardless of the size of the man rel, or of the tube being formed; E, aroll of paper carried by a drum E; F and F, uide rollers about which thepaper asses rom the roll E; and F an adjustab e roll disposed near themandrel and from which the paper passes directly to the mandrel.

The frame A. ma be of any suitable construction. In the orm shown, itcomprises a suitable standard on which the top A is rigidly secured bany suitable means.

The mandrel is equip ed at one end with a handle or a crank by means ofwhich the mandrel may be rotated to wind the coated or impregnated aperthereon. The mandrel is made readil removable from its supportingstandards and B in any suitable manner. Thus, in Figs. 2 and 4, thestandard B is shown as rovided with a stub-shaft 1, which is justablethrough the standard and may be secured in,

adjusted position b any suitable means, as by means of the c ampingdevice 2. The stub-shaft is equipped with a hollow cone 3, whichreceives the end of the mandrel-shaft. When desired, the stub-shaft 1may be shifted longitudinally in the bearing to enable the mandrel to betaken out. o The heated roll C is suitably journalled having their innerends pivotally connected with the carriage and having their outer endsextending freely through bearing blocks 10, which are equipped withtrunnions-or pivots 10, which are journalled in the free end of the arm8; and heavy coil springs 11 encircling. the links 9 and interposedbetween shoulders at the inner end of said links and the bearing blocks10, which are freely slidable on the outer ends of said links. The outerends of the links 9 are equipped with collars 12, which are ada ted toengage the blocks 10, so that the links will serve in retracting thecarriage.

The mechanism D for shifting the carriage D is of the same construction,and the parts are similarly designated.

The eccentric devices C and D are alike in construction and operation.The rockshafts 6 are, in both cases, shiftable longitudinally of theframe in elongated slots 13, with which the frame is provided. Theseeccentric devices comprise an eccentric shaft 14, journalled in theframe and equipped with a pair of eccentrics 15 and a pair of eccentricrods 16, connecting the eccentrics with the rock-shaft 6. The eccentricshaft is equipped with an actuating handle 17. It will be understoodthat when the eccentric shaft is turned in its bearings, the rock-shaft6 will be adjusted or shifted in its bearin s, thus giving a new fulcrumpoint for the carriage shifting mechanism to work from. Thus, there areprovided simple, ositive and easily operated devices for a justing thepositions of the rock-shafts 6, and in this manner adjusting thepressure-rolls to accommodate mandrels of varying sizes or I tubes ofvarying sizes.

The mechanisms C and D for shifting the piessure-rolls into and out ofthe operative position constitute lever-and-link devices, which enablethe carriages to be shifted quickly; and these devices have associatedwith them springs for transmitting the pressure to the'pressure-rolls,so that the pressure-rolls can yield as much as may be i am necessar asthe thickness of the tube increases 1n the tube forming operation.

The carriages C and D are shown connected with the frame by means oflongitudinal guides 18, as will be understood from Fl 's. 1 and 4.

he pressure-roll carriages are shown in Fig. 3 in the position whichthey occupy when the pressure-rolls are in position to compact the pliesof paper together as the that very great force can be exerted throughthesprings 11. The arms 8 may be carried slightly past the dead centerand brought intoengagement with stubs 19, so that the toggle leverarrangement will be locked in position, if desired. The dotted lines inFig. 3 show the manner in which the links 9 may be retracted to withdrawthe carriage.

The paper carr ing drum E is shown provided with a riction device 20,which may be of any desired construction.

In the operation of the machine, the coated or impregnated paper passesfrom the'paper roll E beneath the ide roll F, thence about the guideroll F and thence over the guide r0111, from which it passes between themandrel and the pressure-roll C, and is wound upon the mandrel. The

course of the paper is indicated by the dotted line 21 in Fig. 1.Assuming the aper to be coated or impregnated with a tusible binder,such as a dried varnish composed of a phenolic condensation product,shellac or the like, the paper may be wound upon the mandrel by turningthe mandrel through the medium of the crank B; and assuming thepressure-roll to be in the position indicated in Fig. 3, the heatedpressure-roll will cause the binder to be fused, and the plies of paperwill be closely compacted together by the pressure-rolls as the windingproceeds. After a suitable thickness of tube has been produced, thepaper is cut, the mandrel is given a few more turns, and the tube andmandrel may then be removed from the machine to enable a fresh mandrelto be inserted.

Depending upon the nature of the binder used and the character of theproduct being produced the tube may be treated further after removalfrom the tube forming machine, or it may become a finished-product inthe tube forming machine. If a phenolic condensation product is employedas a binder, further treatment is desirable, either in a heated press,or in an oven or the like, which will serve to convert the condensationproduct to the final insoluble condition. If shellac be employed as ahinder, the tube in that the rock-shaft 6 is 10urnalled in an adjustableslide or carriage 22, connected with the guides 18; and in thismodification, the rear ends of the eccentric rods 16 are connected withthe carriage or shiftable fulcrum-carrier 22 by pivots 23. Also, therock-shaft 6 is, in the modification, journalled in the shiftablesupport 22. The foregoing detailed description has been given forclearness of understanding only, and no unnecessary limitations shouldbe understood therefrom, but the appended claims should be construed} asbroadly as permissible, in view of the prior art.

What I regard as new, and desire to secure by Letters Patent, is v 1. Ina machine of the character set forth, the combination of a mandrel,carriages mounted on opposite sides thereof, pressure- ;rolls mounted onsaid carriages, carriage shifting mechanisms, and means for adjusta ingthe fulcrums from which said carriage shifting mechanisms operate.

2. In a machine of the character set forth, the combination of a,mandrel, carriages mounted on opposite sides thereof, pressurerollsmounted on said carriages, rock-shafts shiftably mounted on the frame,means for shifting said rock-shafts and operative connections betweensaid rock-shafts and said carriages.

3. In a machine of the character set forth, tire combination of amandrel, carriages mounted on opposite sides thereof, pressurerollsmounted on said carriages, rock-shafts shiftably mounted on the frame,and operative connections between said rock-shafts and said carriages,comprising arms mounted -on the rock-shafts, links extending betweensaid arms and said carriages, and

springs interposed between said arms and said carriages.

4:. In a machine of the character set forth, the combination of amandrel, carriages dis-' posed on opposite sides of said mandrel,rock-shafts mounted on the frame eccentric devices for shifting saidrock-shafts, o erative connections between said rock-s afts and saidcarriages, and pressure-rolls mounted on said carriages.

5. In a machine of the character set forth, thecombination of a mandrel,carriages mounted on opposite sides thereof, pressurerolls journalled insaid carriages; rockshafts shiftably mounted on the frame andoperatively connected with said carriages, and eccentric devices mountedon the frame and connected'with and serving toshift said rock-shafts.

6. In a machine of the character set forth, the combination of a framerovided at its upper portion with longitu inal guides, a mandrel havingits ends journalled on said frame, a carriage mounted to move in saidguides, a pressure roll mounted on said carriage and adapted to co-actwith said mandrel, a suitably mounted rock-shaft equipped with anoperating lever and equipped with arms, links pivotally connected withsaid carriage, slidable connections between said links and theextremities of said arms, and springs interposed between the carriageand said slidable connections, said links and arms affording togglejoints which may be thrown into locking position, the springs permittingrecession of the carriage as the thickness of the tube being formed onthe mandrel increases' I HERBERT A. FABER.

